gcc-13.1 static analyzer complains that alloc() returns long *
without guaranteeing to allocate an integral number of longs. Fix
by rounding the requested amount up to the next long when dividing
the amount by 'sizeof (long)' yields a remainder. Surprisingly--to
me, at least--the analyzer recognizes that this extra argument
manipulation will always produce a viable amount no matter what
alloc()'s caller passes in.
Also, the declarations for alloc() and re_alloc() in alloc.c didn't
match the ones in global.h for the MONITOR_HEAP config. I guess
nobody has tested that since NONNULL got introduced.
A year ago the two FITSxxx routines were moved from hacklib.c to
alloc.c so that they could easily be linked into various programs
instead of being replicated in each, but the declarations for them
weren't moved from hacklib.c section in extern.h to alloc.c one.
1209b15bcf